Flow stress behavior of Cu13Zn alloy deformed at elevated temperature |
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Authors: | Li Luo-xing Peng Da-shu Luo Feng-hua Zhou Mei-ling |
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Affiliation: | (1) Department of Materials Science and Engineering, Central South University, 410083 Changsha, China;(2) Department of Materials Science and Engineering, Beijing Polytechnic University, 100022 Beijing, China |
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Abstract: | The flow stress behavior of Cu13Zn alloy was investigated by compression tests carried out at 650 °C, 700 °C, 750 °C, 850 °C, and constant strain rates of 0.05 s−1, 0.1 s−1, 0.5 s−1, 1 s−1, 5 s−1, respectively. The results show that the flow stress increases with the increase of strain and reaches a steady-state stress, and the saturated stress (σ s) increases with the increase of the strain rate and the decrease of temperature. Flow stress curves of the alloy deformed at elevated temperatures can be simulated effectively by the model proposed by Zhou and Clode, and the flow stress is described as a function of strain, strain rate and temperature. Material constants values are: Q=270.43 kJ/mol, α=0.020 94, A=1.747×1011 s−1 and n=3.549 mm2·N−1, the deformation mechanisms of the alloy are self-diffusion and dynamic recovery. Biography of the first author: LI Luo-xing, doctoral student, born in 1968, majoring in materials engineering. |
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Keywords: | flow stress deformation mechanism copper zinc alloy |
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